Clothes & Shoes: Try Before You Buy With PrimeWith this new benefit to Prime subscribers, customers get 7 days to try-on 3 to 8 clothing items at a time before buying.
Select which items you plan to keep, and return the rest using the provided UPS return label.
They are also giving free $20 credit when you keep items that total $200 or more.
They say this deal is by "invitation only" but most Prime subscribers should have access to Prime Wardrobe.
Here is how to use it: